This topic does come up every so often, and, as a huge fan of Batman Returns, I also don't mind its take on The Penguin. And watching all the documentaries and such, it's awesome just how connected Danny DeVito was to his character. It's true, looking back, that you can kinda see how Batman Returns marked Burton's... completion, I guess, of the evolution into his unyielding style, which I admit has fatigued me quite a bit over the years. So I can certainly understand derision towards Return for it being that. As was also said in the supplements, "It's a Tim Burton movie." I can also certainly see people agreeing with it being a Tim Burton movie at the cost of not being a Batman movie. I don't think it crosses that line, but it does come pretty close at times.
All that said, I would certainly like to see The Penguin done "right."